[cmucl-imp] CMUCL bug when compiling defclass

[Faré]

Here is a reduced test case.
Compiling and loading a1 in an image is fine.
Compiling and loading a2 in an image is fine.
Loading a1 then compiling a2 causes an error. It doubly shouldn't.

Tested with CMUCL 20c on i686.

—♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org
I have never let my schooling interfere with my education. — Mark Twain